Incidence of Human Immunodeficiency Virus Type 1 Dual Infections in Amsterdam, The Netherlands, during 2003-2007

Background. The occurrence of human immunodeficiency virus type 1 (HIV-1) dual infections in Amsterdam, The Netherlands, was examined during 2003–2007 to investigate whether the number of HIV-1 dual infections increased as the number of HIV-1 infected individuals increased during the same period. Methods. All first HIV-1 genotyping sequences obtained from 2003 through 2007 were retrieved and examined for the number of degenerate base codes in the reverse-transcriptase fragment. A total of 72 patients had ⩾34 degenerate base codes; for these patients, a fragment of the V3-V4 region of the env g... Mehr ...